The SS-208 Grayback started off patrolling the Caribbean Sea for patrols. Her first kill on March 17, 1942 was an enemy cargo ship and the SS-208 would go on to sink a total of 14 Japanese ships. The Grayback’s 10th patrol saw the sinking of four Japanese ships and damaging several others, but was eventually subjected to depth charge attacks by aircraft and by anti-submarine craft and was destroyed.